physics
posted by teja .
a train goes into a tunnel at 20m/s and emerges from itat 55m/s. the tunnel is 1500m long.assuming constant acceleration the time for which the train moves in tunnel is

a=(V^2Vo^2)/2d
a=(55^220^2)/3000=0.875m/s^2
V = Vo + a*t
t = (VVo)/a = (5520)/0.875 = 40 s.
Respond to this Question
Similar Questions

Math
A train is 1 mile long and is going through a tunnel a mile long, if the train is going 15 miles per hour, how long will it take 4 the train to get completley through the tunnel? 
Math
A train that is one mile long starts through a tunnel that is also 1 mile long. the train is traveling 15 miles per hour. how long does it take for the train to get completely through the tunnel? 
Math
A train that is 1 mile long starts through a tunnel that is also 1 mile long. The train is traveling 15 miles per hour. How long does it take for the train to get completely out of the tunnel? 
Math
A train that is 1 mile long starts through a tunnel that is also 1 mile long. The train is traveling 15 miles per hour. How long does it take for the train to get completely out of the tunnel? 
Math
A train that is 1 mile long starts through a tunnel that is also 1 mile long. The train is traveling 15 miles per hour. How long does it take for the train to get completely out of the tunnel? 
physics
An MRT tunnel is 418m long. Calculate the time it will take the 108m long train , travelling at 72km/h to pass completely through the tunnel, leaving your answer in seconds 
Algebra 1
William, a logistician, needs to route a freight train that is 20 feet at its tallest point and 10 feet at its widest point within 3 days. The most direct path includes a singletrack tunnel that needs 24 hour notice prior to use. … 
Math Algebra
A 600 meters long train travels through a 4200 meter tunnel. Two full minutes elapsed from time the front of the train enters the tunnel until the last wagon exits the tunnel. What is the speed, in meters per second, of the train? 
MATH
A 2mile long train travels at 40 miles per hour through a 1.5mile long tunnel. How long will it take the train to completely pass through the tunnel? 
Physics
A tunnel is 800 m long.A 100 m long train crosses the tunnel at a speed of 30m/s.Find the time taken by the train to cross it.